Brake chain attaching device



Feb. 21, 1933. I J WILSON 1,898,607

BRAKE CHAIN ATTACHING DEVICE Original Filed Deb. 10, 1930 Patented Feb. 21, 1933 UNITED STATES JACK WILSON, OF CHIOAGO, ILLINOIS, ASSIGNOR TO UNIVERSAL DRAFT GEAR ATTAOH- I PATENT OFFICE KENT 60., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS BRAKE CHAIN ATTAOHING DEVICE Refiled for abandoned application Serial No. 501,231, filed December 10, 1930. This application Med January 22, 1932.

application Ser. No. 501,231, filed Dec, 10,

1930. The object of the invention is to provid means for anchoring the chain to'the drum, whereby the use of an attaching draft pin is avoided; and it consists of the structure (such as hereinafter described, and as illustrated in the accompanying drawing, in which, i

Fig. 1 is a detail end elevation of a railway car end and of the brake operatingmechanism s cured thereto;

F'g. 2 is a detail sectional view on an enlarged scale, taken on the line 2-2 of Fig. 1;

Fig. 3 is a view on the line 33 of Fig. 2;

Fig. 4 is a detail of the winding drum and hralke chain, taken on the line 4-4 of Fig. 3; an

Fig. 5 is a sectional detail similar to Fig. 4, showing a modified form of construction:

The invention is especially applicable to so-called high power brakes, in which the winding drum makes but a single rotation in the brake-setting operation and is in the form of an eccentric, the chain being attached at its longest radius in order that the slack may be quickly taken up, the power applied being increased as the drum is turned. 1

Heretofore it has beenthe practice to attach the chain to the drum by inserting the end link in a periphery recess and sett ng a pin directly through the drum, passing it through'the link. This method vof attachment is objectionable mainly because it weak ens thedrum, requires the use of a special part, and increases the labor necessary in connecting and disconnecting the chain. According to the present invention apocket of special form is provided within the periphery' of the drum, within which the end link of the ChfilIT'lS'SGfiiEGdjflChfiTlDBl leading from the pocket accommodating the second link, the plane of which is transverse to that of the first link.

In the drawing the end of a car is indi- Serial No. 588,093.

cated at 10, to which the casing 11, carrying I the brake operating mechanism, is suitably attached. This mechanism comprises a brake stafl 12, extending horizontally through the casing and carrying a hand wheel 13 and a pinion'14. This pinion meshes with a gear wheel 15, of much larger diameter, which is similarly journaled at 16 in the casing walls.

The winding drum 1'?" is fixed upon the shaft of the gear 15, or may be formed integrally therewith. This drum is in the form of an eccentric cam, and preferably has va,

plurality of flat faces, as shown at 18, 19, 20 and 21, and is circumferentially channeled, as shown at 22, toreceive the chain links, the

planes of which are transverse to the axis of the drum. v

Within the body of the cam, and interme-' diate of its faces 18 and 21, there is formed a pocket 23, opening through the periphery of the cam and of such size as to receive the end link 24 of the chain with its plane parallel to the axis of the cam, one end of this pocket forming a shoulder v25 for sustaining the stresses of draft applied to the link 24. The peripheral slot 22 of the cam extends through this shoulder into the pocket 23, to-accommodate the second link 26 of the chain.

The axial dimension of the drum is necessarily restricted, and consequently. in order to avoid weakening of the drum, the pocket 23 is so shaped that one link 24, is housed therein, its longitudinal axis being oblique to the drum axis. A pin 27 is inserted transversely through the cam, across the throat of the pocket 23, for the purpose of reventing accidental dislodgment of the link 24 therefrom.

As the cam 17 is turned in countemclockwise direction for winding up the chain the link 26 will be received in the channel 22, extending along the drum face 18, the next successive link of the chain lying flatly along tlie face 19, the following link being received in the channel along the face 20, and the following link lying flatly along the face 21.-

As shown in Fig. 5, there may be substituted for the end link 24 a half link 28, and in this case the size of the receiving pocket 29 may be reduced, suitable means being provided for preventing the accidental shifting of the half link. For this purpose the retaining pin 30 may be so positioned as to 5 engage one end of the half link, a shoulder 31 formed within the pocket being engaged by its opposite end. This modification has the advantage that the walls of the drum are weakened to a less extent while it 'is less de- 10 sirable than the previously described const-ruction, in that it requires the cutting of the link of the chain or the provision of an extra half link.

I claim as my invention 15 1. A winding drum for car brakes having a pocket entering from its periphery for receiving an end link of a chain, and a slotted shoulder at the base of. the pocket for resisting strain on the named linkand 2 accommodating the next adjacent chain link.

2. A winding drum for car brakes having a pocket entering from its periphery and shaped to receive the end link of a chain when positioned with its major axis oblique 2 to the axis of the drum, and a shoulder for resisting pulling strain on the named link, suchshoulder being slotted to accommodate the next adjacent link of the chain.

3. A winding drum for car brakes hav- 80 ing a. pocket entering from its peripher for receiving a holding bar positioned ob lque to the axis of the drum, and a slotted shoulder at the forward side of the pocket for accommodating a. chain link when looped upon 35 the bar.

In estimony whereof I aflix my signature.

JACK WILSON. 

